Answer in brief
CVE-2026-55864 records a High severity vulnerability in GeoNetwork: Unauthenticaded Server-Side Request Forgery in SLD Tool. The current sources do not mark it as known exploited. The current feed maps geonetwork/core-geonetwork (generic), org.geonetwork-opensource:gn-web-app (maven), org.geonetwork-opensource:gn-web-app (maven), org.geonetwork-opensource:gn-web-app (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps geonetwork/core-geonetwork (generic), org.geonetwork-opensource:gn-web-app (maven), org.geonetwork-opensource:gn-web-app (maven), org.geonetwork-opensource:gn-web-app (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| geonetwork/core-geonetworkgeneric | >= 4.0.0, < 4.2.17 || >= 4.4.0, < 4.4.12 | Not reported |
| org.geonetwork-opensource:gn-web-appmaven | >=4.4.0,<=4.4.11 | 4.4.12 |
| org.geonetwork-opensource:gn-web-appmaven | >=4.0.0,<=4.2.16 | 4.2.17 |
| org.geonetwork-opensource:gn-web-appmaven | >=4.4.0 <4.4.12 | 4.4.12 |
| org.geonetwork-opensource:gn-web-appmaven | >=4.0.0 <4.2.17 | 4.2.17 |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 9, 2026
GeoNetwork is a catalog application to manage spatially referenced resources. Prior to 4.2.17 and 4.4.12, POST /api/tools/ogc/sld accepted a caller-supplied WMS server URL and performed a server-side HTTP GET without destination validation. An anonymous attacker could make the GeoNetwork server send requests to internal hosts that are not publicly reachable. When the outbound response was XML, the endpoint could store and return the fetched body, making the request forgery non-blind and enabling internal data disclosure, authorization bypass, and network reconnaissance. This issue is fixed in versions 4.2.17 and 4.4.12.
Quoted source text, attributed separately from HOL analysis.